Sealing piston for reservoirs for the storage of gas, steam, or easilyevaporating liquids



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STEAM, 0R EASILY EVAPORATING LIQUIDS Filed Jan. 5, 1927 sealing-pistonNov. 27, 1928.

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. I, Application Ma a a, 5,1927, serial No. 159,230, andin GermanyJanuary The invention relates to improvements in sealing-pistons forreservoirs for the storage of gas, steam, or easily evaporating liquids,in which a packing-ring, surrounding the piston, is forced againstthewall of the reservoir. In the known arrangements of this kind, forceis exerted upon'the packing-ring by single levers, or-by singleangle-segments, separated from one anotherQ According to the presentinvention, the packing-ring is supported by an endless, flexiblesheet-metal ring, upon which the elements, (weight, springs) act inforcing the packing-ring against" the wall of the reser- The advantageof this arrangement consists therein, that a perfectly uniform action isobtained upon the'packing-ring, so that a is produced, which may in facthoused in practice wi'thout the employment ofafiuid-packing, 7

Examples of executing the invention, are illustrated in the drawing, inwhich Figs. -1, 2 and 3 are. vertical, axial sections of the piston indifferent types of construction,

'Fig. 4 is a horizontal thereto, of the devices for on the plates areomitted.

In the construction illustrated in Fig, 1, the piston a is on its outercircumference provided with a ring consisting of single plates 6. Theplates 6 are by their lower ends rigidly fastened to the piston byangleirons c and connected bymeans of elastic caps 0 (Fig. 4), so that acontinuous, elastic sheet-metal ring is formed. The plates 6 are forcedradially outwards by angle-levers (Z loaded with weights 6.

In order to distribute the pressure of the angle-levers uniformly overthe entire plate, the said plate is preferably provided with a profilediron, (not illustrated) running-out 1n the direction of the periphery,upon which the angle-lever exerts its action.

The plates 6 carry on their upper end an endless packing-ring f, whichis forced against the inner walls 9 of the reservoir. The said ring maybe made of a cotton texture inlaid with rubber, cotton with leatherinsertions, asbestos with rubber, rubber only, leather only, or similarmaterials being flexible and gas-tight.

In the construction illustrated in Fig. 2,

section pertaining exerting force up the plates of the sheet-metal-ring,connected by caps c, are flexibli suspended at their upper ends at i butt ey need not be flexible in this case in themselves. The plates areforced outwards by springs 2'. As the lower end of the plates 1) is notrigidl connected with the piston a, packing has to e rovided bettvgeenthe said plates 6 and the b0 y of the pis n.

In the present instance, a plunger-lock It has been provided, packingmay however be arranged many other suitable manner.

In the arrangement according to Figs. 3 and 4, the plates 6 of thesheet-metal ring connected by caps c, are suspended on the piston a bymeans of rods Z and forced outwards by weights 6, by means ofangle-levers d, as in the type of construction illustrated in Fig. 1.The plates carry two packing-rings f.

The instrumentalit-ies constructed and arranged as herein specifiedprovide a two-fold sealing unit positively preventing gas escape betweenthe piston and holder, i. e., a liquid sealstructure or liquid trap, ina lower horizontal plane and a mechanical seal structure in the natureof an expansible and compressible packing ring, adapted for lubricationif desired, in superposed relation to the liquid seal structure, thecharacteristic of the combined seal being that the packing carryingmember constituting the liquid seal is subjected to a constant dilatingpressure, establishing a fluid tight joint between the packing andholder.

1. In a sealing-piston for reservoirs for the storage of gas, steam oreasily evaporating liquids a packing ring, a closed flexible anddilatable sheet-metal ring the parts of which are tightly connected toone'another, said sheet metal ring supporting said packing ring andmeans forpressing said packing ring against the walls of the reservoir.

2. In a sealing-piston for reservoirs for the storage of gas, steam oreasily evaporating liquids a packing ring, an endless flexible anddilatable sheet-metal ring supporting said packing ring, saidsheet-metal ring consisting of plates connected by means of elasticcaps, and means for pressing said packing ring against the walls of thereservo1r.

3. In a sealing-piston for reservoirs for the storage of gas, steam oreasily evaporating metal rmg an endless flexible and atable sheet-metalring sup orting said packing ring, one edge of sai metal ring beinglinked to the piston, and means for pressing said packing ring againstthe walls of the reservoir.

4. In a sealing-piston for reservoirs for the storage of gas, steam oreasily evaporating liquids a packing ring, an endless flexible anddilatable sheet-metal ring supporting said packin ring, said sheet-metalring consisting of p ates connected by means of elastic caps, one edgeof said metal ring being linked to the piston, and means for pressingsaid packing ring against the walls of the reservoir.

5. In a sealing-piston for reservoirs for the storage of gas, steam oreasily evaporating li uids a packing ring, an endless flexible andilatable sheet-metal ring supporting said packing ring, the upper edgeof said being linked to the piston, a cup provided on the piston, thelower edge of said metal ring being plunged into said cup, and

li uids a packing ring ail means for ressing said packing ring againstthe wall 0 the reservoir.

6. In a sealing-piston for reservoirs for the stora e of gas, steam oreasily evaporating li ui s a packing ring, a closed flexible and diatable sheet-metal ring, said sheet metal ring consisting of platesconnected by means of elastic caps supporting said packing ring, anglelevers with adjustable weights, being arranged on the upper side of thepiston, said levers forcing radially outwards said plates and pressingsaid packing ring against the wall of the reservoir.

7. In a device of the class described, in combination with a gas holderand piston, a two-fold sealing umt mounted on the piston, comprising aliquid seal structure and a packing member disposed in parallel planes,the liquid seal structure comprisin a dilatable member flexiblyconnected to t e piston, said packing carried thereby and meansproviding a yielding contact between said packing and holder.

8. In a device of the class described, in combination with a fluidholder and floatin piston formed with an annular liquid sea cup memberadjacent the holder, a flexible and dilatable liquid seal constitutingmember secured to move with and in relation to the piston, a packingcarried thereby and tension means holding the packing in yieldingcontact with the holder.

9. In a device of the class described, in combination with a fluidholder and floating piston formed with an annular liquid seal cup memberadjacent the holder, a flexible and dilatable liquid seal constitutingmember secured to move with and in relation to the piston, a packingcarried thereby and tensio means tending to dilate said member anyieldingly contact the packing against the holder.

In testimony whereof I have aflixed my signature.

FRIEDRICH SOHURMANN.

